Improvement in grinding-m ills



c. & A. KAESTNER.

Grinding Mill. No. 53,989. Patented April 17, 1866.

min a s 56$ fz/v araZvzs J fw M UNITED STATES PATENT @FFICE CHARLESKAESTNER AND AUGUSTUS KAESTNER, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN GRINDING-MILLS.

Specification forming part of Letters Patent No. 53,989. dated April 17,1866.

' son skilled in the art or science to which it most nearly appertainsto make and use our said invention or improvements without furtherinvention or experiment.

The nature of our invention and improvements consists in the peculiarconstruction and arrangement of devices hereinafter described andclaimed in the following specification.

In the accompanying drawings, Figure 1 is an elevation of one end of amill with our improvements. Fig. 2 is an elevation of one side, and Fig.3 a plan or top view with the hopper and top casing removed.

In these drawings, A is a rectangular frame, supported by four legs, B BB B. This frame and legs we make of cast-iron, in the form shown in thedrawings-that is, the rectangular frame has two arms, C C, projectingfrom it, to which arms the bar D is bolted, which has a box on or in itfor the journal of the shaft E, and the journal at the opposite end ofsaid shaft turns in box F on the frame A.

The shaft E' has the pulley G fastened to it for a band from some movingpower to turn the mill. The rotating stone H is fastened to this shaftE, and is carried by it. The shaft E turns in the stationary stone 1,which stone is hung on radial pivots provided with rollers, one of whichis shown at J, Fig. 3, which rollers J traverse in the grooves K K whenthe stone and shaft are removed for the purpose of picking andsharpening. There is also a roller, L, in the frame A, right under theshaft E, as shown in Fig. 3, to support the shaft when the bar D andjournal-box are removed and the shaft drawn out of the box F, so thatthe shaft and stones may be removed and turned with their faces upwardto be picked without turning up the frame or running any risk ofbreaking the frame or legs.

There are some caps, M M, fastened to the frame A to cover the rollersJ, one of which is broken off to show the roller in the drawings. Thetop of the stationary stone I is broken out to show the feeding-fan N,fastened to the shaft E, which fan is made spiral or inclined to theface of the running stone to carry the grain from the stationary towardthe running stone and deliver it between them.

' P is a pipe fitted to the opening in the stone I, and extending up toreceive the end of the funnel Q, supported by the casing It, whichcovers the stones.

The two-armed bracket J has a hole in it for the shaft E, and is hung tothe frameAby two pirots, one above and the other below the shaft, (seeK, Fig. 3,) so as to rock freely on the pivots K and press thestationary stone uniformly against the running stone, the ends of thebracket being rounded to let the stone rock in either direction.

Thetop casing,1t, is made in the form shown in the drawings, andfastened to the frame A by the bolts S S, and to this casing thestandards T T are fastened, and the bracket U to support the top piece,V, which holds the hopper W, into which the grain is fed to be ground,and passes from the hopper into the shoe X, which conveys it to thefunnel Q, above mentioned. The rear end of the shoe is supportedv by thelever Y, which vibrates on a screw, Z, in the case R, and is vibrated bythe tappet a in the shaft E, (shown in Fig. 3,) and by the spring I),fastened to the casing under the stones. The frame of the shoe X extendsacross the funnel, and is suspended by the cord 0 to the axis of thehand-wheel d, which turns in the top piece, V, to adjust the shoe tofeed fast or slow, as desired.

To press the running against-the stationary stone, we fasten the stand 0to the bar D, to support the traversing-pin f, which has a mortise in itfor the lever g, which lever has its fulcrum on the screw it in the barD.

The lever g is connected to the rod i, which runs by the side of theframe and through the pivot for the stone.

movable to adjust or balance the stone onthe tion with the pivotedbracket J, arranged as pivots, we fasten some dovetailing pieces 1" todescribed, for the purposes set forth.

the stone, (see Fig. 4,) and fit a block, 8, to 2. Making the pivotsadjustable on the edge traverse on them, with a female screw in the ofthe stationary stone, substantially as deblock to which the pivot isfitted to serve as a scribed, for the purpose of balancing the stone.set-screw to hold the block in place and as a GEARS KAESTNER AUGUSTUSKAESTNER.

We claim- 1. The adjustable radial pivots provided Witnesses:\vithrollers J, working in grooves on the frame CONRAD L. DIEHL, tosupport the stationary stone, in combina' E. MEININGER.

